prefer (X ? 1 : -1) when converting from boolean (1,0) to int (1,-1)

[gnulib.git] / ChangeLog

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+2010-10-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+       prefer (X ? 1 : -1) when converting from boolean (1,0) to int (1,-1)
+
+       Formerly the style was sometimes 2*X - 1, because the C standard
+       was wrongly thought to disallow ?: in integral constant expressions.
+       * lib/inet_ntop.c (verify_int_size): Rewrite 2*X-7 (!) to 4<=X?1:-1.
+       * lib/signal.in.h (verify_NSIG_constraint): Rewrite 2*X-1 to X?1:-1.
+       * lib/spawn.in.h (verify_POSIX_SPAWN_USEVFORK_no_overlap): Likewise.
+       * lib/stdint.in.h (_verify_intmax_size): Likewise.
+       * lib/time.in.h (struct __time_t_must_be_integral): Rewrite
+       2 * ((time_t) 1 / 2 == 0) - 1 to (time_t) 1; this suffices to
+       verify that time_t cannot be floating.
+
 2010-10-08  Eric Blake  <eblake@redhat.com>
 
        time: enforce recent POSIX ruling that time_t is integral